Where to Watch Distant Thunder (1988)

A hero of war. A casualty of peace, With only one hope for survival...his son.

A troubled Vietnam war vet deserts his wife and child shortly after he returns from the war. He returns after 10 years, where he's been living like an animal in the forest. He finds himself unprepared for the changes that he will have to cope with, and when the vet tries to contact his son, he realizes that he has caused more damage than he had imagined.